Measurement of talc in flour by the prompt-gamma ray neutron activation analysis method.
Characteristic γ ray
D-T neutron generator
Library least-squares
PGNAA
Journal
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine
ISSN: 1872-9800
Titre abrégé: Appl Radiat Isot
Pays: England
ID NLM: 9306253
Informations de publication
Date de publication:
Dec 2021
Dec 2021
Historique:
received:
07
03
2021
revised:
29
08
2021
accepted:
30
08
2021
pubmed:
2
10
2021
medline:
9
3
2022
entrez:
1
10
2021
Statut:
ppublish
Résumé
Prompt gamma-ray neutron activation analysis method (PGNAA) was used to measure the talc content in flour. Neutron activation prompt gamma spectrum measured by NaI(Tl) detector has complex components, poor energy resolution, and high Compton plateau, how to obtain accurate element content from the prompt γ spectrum is one of the core problems of PGNAA. To reduce the systematic uncertainty caused by the variation of the neutron energy spectrum and γ self-absorption in different samples, the spectral decomposition method based on library least-squares was improved. As a result, the average relative deviation between the calculated values from measured spectra and the theoretical values based on the known composition was reduced from 6.1% to 0.3%. The relative uncertainty of 30 measurements on the same sample was reduced from 4.8% to 3.0%. The detection time can be reduced to 1 min, which meets the requirement of on-line measurement for talc in flour.
Identifiants
pubmed: 34598039
pii: S0969-8043(21)00329-8
doi: 10.1016/j.apradiso.2021.109932
pii:
doi:
Substances chimiques
Talc
14807-96-6
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
109932Informations de copyright
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